MATLAB: Calculating velocity and acceleration from force data

acceleratioonvelocity

bw means bodyweight
g=-9.81
I have a force and I have tried to take the bw away from the force and then find velocity and acceleration is this right?
    % Calculation of Velocity and Acceleration
        %force to acceleration by f=ma
        %acceleration=force/mass
        %acceleration to velocity = cumtrapz
        time = (0:fps:length(fz)-fps);
        bw = nanmean(abs(fz(1:to(i,1):40))); 
        mass = bw/g;
        IFz= fz - bw;
        I = trapz(time(to(i,1):td(i,1)), IFz(to(i,1):td(i,1)));  
        a = I/mass; 
        %velocity
        v = I/(bw);

Best Answer

Look at the dimensions of your variables:
        a = I/mass;  -> Newtons / kg  = m/s^2  -> OK
        %velocity
        v = I/(bw);  -> Newtons / Newtons  -> NO OK
your definition of velocity does not seem to be right
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